Returning thumbnail image in imageview using JSON for a list

public static final int NUMBER_OF_POSTS = 10;
public static final String TAG = NewsFragment.class.getSimpleName();
protected JSONObject mBlogData;
protected ProgressBar mProgressBar;

private final String KEY_TITLE = "title";
private final String KEY_DATE = "date";
private final String KEY_THUMBNAIL = "thumbnail";

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_news_list,
            container, false);
    mProgressBar = (ProgressBar) rootView.findViewById(R.id.progressBar1);

    if(NetworkIsAvailable())    {
        mProgressBar.setVisibility(View.VISIBLE);
        GetBlogPostsTask getBlogPostsTask = new GetBlogPostsTask();
        getBlogPostsTask.execute();
    }
    else {
        Toast.makeText(getActivity(), "Network is unavailable!", Toast.LENGTH_LONG).show();
    }

    //String message = getString(R.string.no_items);
    //Toast.makeText(this, message, Toast.LENGTH_LONG).show();

    return rootView;
}


@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
    try {
    JSONArray jsonPosts = mBlogData.getJSONArray("posts");
    JSONObject jsonPost = jsonPosts.getJSONObject(position);
    String blogUrl = jsonPost.getString("url");

    Intent intent = new Intent(getActivity(),BlogWebViewActivity.class);
    intent.setData(Uri.parse(blogUrl));
    startActivity(intent);
}
    catch (JSONException e) {
        logException(e);
    }
}

private void logException(Exception e) {
    Log.e(TAG, "Exception caught!", e);
}

private boolean NetworkIsAvailable() {
    ConnectivityManager manager = (ConnectivityManager) 
    getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = manager.getActiveNetworkInfo();

    boolean isAvailable = false;
    if(networkInfo != null && networkInfo.isConnected()) {
        isAvailable = true;
    }
    return isAvailable;
}

public void handleBlogResponse() {
    mProgressBar.setVisibility(View.INVISIBLE);
    if (mBlogData == null) {
        updateDisplayForError();
    }
    else { 
        try {
            JSONArray jsonPosts = mBlogData.getJSONArray("posts");
            ArrayList<HashMap<String, String>> blogPosts = new ArrayList<HashMap<String, String>>();
            for (int i = 0; i < jsonPosts.length(); i++) {
                JSONObject post = jsonPosts.getJSONObject(i);
                String title = post.getString(KEY_TITLE);
                title = Html.fromHtml(title).toString();
                String date = post.getString(KEY_DATE);
                date = Html.fromHtml(date).toString();
                String thumbnail = post.getString(KEY_THUMBNAIL);
                thumbnail = Html.fromHtml(thumbnail).toString();

                HashMap<String, String> blogPost = new HashMap<String, String>();
                blogPost.put(KEY_TITLE, title);
                blogPost.put(KEY_DATE, date);
                blogPost.put(KEY_THUMBNAIL, thumbnail);

                blogPosts.add(blogPost);
            }
            String[] keys = { KEY_TITLE, KEY_DATE, KEY_THUMBNAIL };
            int[] ids = { android.R.id.text1, android.R.id.text2 };
            SimpleAdapter adapter = new SimpleAdapter(getActivity(), blogPosts, android.R.layout.simple_list_item_2, keys, ids);
            setListAdapter(adapter);
        } catch (JSONException e) {
            logException(e);
        }
    }

}


private void updateDisplayForError() {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());   
    builder.setTitle(getString(R.string.error_title));
    builder.setMessage(getString(R.string.error_message));
    builder.setPositiveButton(android.R.string.ok, null);
    AlertDialog dialog = builder.create();
    dialog.show();

    TextView emptyTextView = (TextView) getListView().getEmptyView();
    emptyTextView.setText(getString(R.string.no_items));
}

private class GetBlogPostsTask extends AsyncTask<Object, Void, JSONObject> {

    @Override
    protected JSONObject doInBackground(Object... params) {
        int responseCode = -1;
        JSONObject jsonResponse = null;
        StringBuilder builder = new StringBuilder();
        HttpClient client = new DefaultHttpClient();
        HttpGet httpget = new HttpGet("http://www.ilovelimerick.ie/?json=1&count=10");

        try {
            HttpResponse response = client.execute(httpget);
            StatusLine statusLine = response.getStatusLine();
            responseCode = statusLine.getStatusCode();

            if (responseCode == HttpURLConnection.HTTP_OK) {
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while((line = reader.readLine()) != null){
                    builder.append(line);
                }

                jsonResponse = new JSONObject(builder.toString());
            }
            else {
                Log.i(TAG, String.format("Unsuccessful HTTP response code: %d", responseCode));
            }
        }
        catch (JSONException e) {
            logException(e);
        }
        catch (Exception e) {
            logException(e);
        }           

        return jsonResponse;
    }   

    @Override
    protected void onPostExecute(JSONObject result) {
        mBlogData = result;
        handleBlogResponse();
    }

}

<TextView
    android:id="@android:id/empty"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" />

<ProgressBar
    android:id="@+id/progressBar1"
    style="?android:attr/progressBarStyleLarge"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true" />

<ListView
    android:id="@android:id/list"
    android:layout_width="235dp"
    android:layout_height="match_parent"
    android:layout_alignParentRight="true"
    android:layout_alignTop="@android:id/empty" >

</ListView>

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignTop="@android:id/empty"
    android:layout_toLeftOf="@android:id/list"/>